(19)

(11)

EP 2 864 551 A1

(12)

(43) Date of publication: 29.04.2015 Bulletin 2015/18 (21) Application number: 13733416.5 (22) Date of filing: 20.06.2013

(51) International Patent Classification (IPC):  E02D 27/52(2006.01) (86) International application number: PCT/GB2013/051629 (87) International publication number: WO 2013/190316 (27.12.2013 Gazette 2013/52)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 20.06.2012 GB 201210882 22.08.2012 GB 201214962 (71) Applicant: Aquamarine Power Limited Glasgow G2 5NJ (GB)	(72) Inventor: MONTAGUE, Richard Glasgow G2 5NJ (GB) (74) Representative: Hargreaves, Timothy Edward  Marks & Clerk LLP Atholl Exchange 6 Canning Street Edinburgh EH3 8EG Edinburgh EH3 8EG (GB)